#showbox {
    position: relative;
    width: 730px;
    height: 454px;
    top: 50%;
    margin: 0 auto;
    /*box-sizing: border-box;*/
    border: 6px solid red;
    overflow: hidden;
}
#content {
    position: absolute;
    width: 4380px;
    height: 454px;
    /*margin: 0 auto;*/
}
#showbox #content #item{
    float: left;
}
#leftArrow, #rightArrow{
    width: 30px;
    height: 45px;
    background-color: rgba(0,0,0,0.8);
    transform: translateY(-250px);
    z-index: 9;
}
#leftArrow{
    position: absolute;
    left: 0;
    box-sizing: border-box;
    padding: 5px 5px;
    bottom: -40px;
}
#rightArrow{
    position: absolute;
    right: 0;
    bottom: -40px;
}
#uls{
    list-style: circle;
    height: 30px;
    position: absolute;
    z-index: 10;
    bottom: -14px;
    left: 43%;
}
#uls li{
    float: left;
    width: 15px;
    padding: 0;
    cursor: pointer;
}

#rightArrow img{
    margin-top: 5px;
}
.active{
    display: block;
}
.unactive{
    display: none;
}
.liactive{
    list-style: disc;
}
